happy
happier
long
longer
large
larger
clumsy
clumsier
icy
icier
slim
slimmer
silly
sillier
soft
softer
sad
sadder
busy
busier
easy
easier
nasty
nastier
good
better
far
further/farther
thin
thinner
bad
worse
angry
angrier
healthy
healthier
creepy
creepier
poor
poorer
friendly
friendlier
young
younger
mad
madder